If after 10...f5, White instead tries 11. f3, then
Black can counter strongly with 11...Nxc3 and 12...c5.

11. bxc3 Nd7 12. Nxd7 Qxd7

13. c4 Rac8

13...c6 would prevent White from establishing
a dominant pawn center. Then on 14. cxd5 cxd5,
Black threatens ...Ba6 followed by ...Bc4, when
the pawn island at d5 would be firmly held.
Then after 15. Qd3 (to prevent ...Ba6), 15...Rac8
with ...Rc4 is a real nuisance.

14. e4 (after 13...c6) would prevent 14...Ba6 due
to 15. exd5 cxd5 16. Bxd5, but 14...Rac8 would
renew the threat of ...Ba6, due to the pin on
the c-pawn which permits ...Qxd5 at the end.

In retrospect, 10. Ne5 was probably premature,
as the exchange on d7 sped up Black's development.
10. Rd1 was more in the spirit of the position,
preparing to pressure the Black d-pawn after an
eventual ...c5.

14. cxd5 Bxd5
15. e4 Bb7 16. Bb2 c5 17. d5 Rfd8 18. Rad1 c4

19. Qc3 Bf8

19...f6, though weakening, avoids the unfavorable
tactics which follow. 19...Bf6 just loses time
after 20. e5.

20. e5 Qb5 21. e6

21...f6

21...Bxd5? loses instantly to 22. e7, since the
dark square bishop cannot abandon control of the
g7 square.